YASKAWA SIEMENS CNC Series, Maintenance Manual, Serviceman Handbook

Page: 206 / 373

Drive system overview 1
13-2
13.1 System configuration
The following figure shows 840DI drive system configuration overview.
Main features of the system are:
• Multi-axis drive system consisting of MRX-type converter unit (Converter), SGDK-type
drive unit (Servo drive), and MX-type spindle drive unit (Spindle drive).
• Each Converter can accommodate up to 7 units of Servo drives and Spindle drives. For
multi-axis configuration, more than 1 Converter can be connected.
• "PROFIBUS" network (PROFIBUS) is used as an interface with CNC. The Converter
performs network processing for all axes.
• In order to reduce wiring to CNC, absolute encoder battery is embedded; and emergency
stop signal input/output, brake signal output, and latch signal input are input/output to
Drive system.
• Digital operator, connected to a Converter, can be used for both a Servo drive and a
Spindle drive in common.
Hardware
timer
Converter Drive #2
Battery
Data bus
Battery
Latch signal
(2 ch)
Data bus
Latch signal
Battery
Drive #1
PROFIBUS
Drive #n(Up to seven axis)
Data bus
Latch signal
Battery
Converter or i/O
Converter or i/O
Emergency
stop
Contactor
200 VAC
Motor
power
Encoder
Brake
Motor
power
Encoder
Brake
Motor
power
Encoder
Brake
ON/OFF
Motor#1 Motor#2 Motor#n
DC power
Digital
operator
Analogue
monitor
(2 ch)
Analogue
monitor
(2 ch)
Analogue
monitor
(2 ch)
PROFIBUS
i/F
(MMC board)
PROFIBUS
i/F
PLC (MMC board)
･ PLC application
NCK (PCU)
･
NCK application
･
CNC program analysis
･
Interpolation, acceleration/
deceleration
･
Position control
(Processing at CNC)
･
Backlash and pitch error
correction
HMI (PCU)
･
HMI application
840DI
Via
PROFIBUS
I/O
(OP)
(OP)